Exhaust-box.



A. w. SWANSON.

EXHAUST BOX.

APPLICATION FILED SEPT-26.19I7.

1,267,019. Patented May 21, 1918.

anon 14501 A ndrw W Swanson.

- w, KW,

atto'umus WA HING N Specification of Lettersfatent;

WASHINGTON, A CORPORATION. OF.

EXHAUST-BOX.

Patented May 21,1918.

Application fi1ed.Septemb er 26, 1917. 'SerialNo. 193,382.

To all whom it may conccrm' Beit. knownthat 1,.ANDBEW W. SWAN SON, a, subject of. the liing of Sweden, (who has taken out his first papers as a. U. S., citizen,) and resident of Bellingham, county. of

hatcem, and State'of NVashington, have invented certain new and useful Improvements in EXhaust-Boxesof which thefollowing is a specification.

My invention relates to devices. of the kind. which are generally-referred. tolasexhaust boxesfandwhich are employed for. the preliminary heating, of. cans containing food products, which heating; occurs priontothe complete sealing; of; the; cans, and after, they havereceived their contents.

The object. ofmy invention isto provide an apparatus ofgthislrindwhich, ,while capable of doing satisfactorywork, willbe much less. insize andgcost than theexhaust boxes which are most commonly employed and, a device which is superior. to,- such exhaust boxes in many-other. ways.

My, invention consistsof. certain features of construction and combinations of parts which. will be hereinafter. described and then particularly pointed out inthe claims.

In the accompanying drawings I have shown my invention in the form oficonstruction which isnowmost preferred by me.

Figure 1 is a side elevation of. the,dev,ice, the same being in major. part, in longitudinal section.

Fig. '2 device.

7 My invention comprises as.,its.inost essential parts, a steam jacketed. tube through which the filledbut unsealed cansiare, passed and means whereby steam under. pressure, 0),, at a temperature whichig .well above. that is transverse cross section of: the

of atmos ,heric 212 a be in ected. into P a 7 Y said tubesonsto Contact with the-said cans.

The particular manner. of embodying this invention. in a. concrete apparatusv is .capa-ble of being, widely varied. The form of construction herein -showmis given n erel y as illustrativeofthe princip -le and representing; the. type. of, construction which is now preferred, as being simple and cheap to make d fli ient. nus as ell as eing strong and unlikely to get out of order,

The heating chamber, as illustrated, consists of two pipes, 1 and 2, these pipes being of different sizes and placed one within the .30, which may, have a. valve 31 other. These pipes are joined at their ends by heads 12, which close the annular chamber 3 formed. between thepipes. Theinner tube is freelyv open at its-ends.

Means are providedefor passing the cans through the inner tube. Saidv means, as herein illustrated, consist of. an endless conveyer in the form of a belt 4-, one run of which passes through the-tube in the direc' time indicated by the arrow. The cans. are placed upon this belt outside of the device and are slowly passed through the same. Any type of conveyor which. would secure the desired. results, might be employed.

The inner tube 2 has seriesof small holes 20 in its-side through which steam from. the jacketing chamber 3. may be dis charged into the inner tube and to contact with the cans 5 which arecontained therein. As a convenience in locating these holes sothat they may be cleaned out, if for any reason they should become stopped, the outer tube-l isprovided with holes 10 which are, however, stopped, when the device is in use by plugs 11. Tosecure exact registry of the holes in the outer and inner tube, these holes are preferably drilled after the two.tub es have-been assembled. It is, therefore, possible to remove the plugs 11 and get at the holes 20in theinner tube andto clear them of any obstructions which may have lodged therein.

Steam is suppliedto thejacketing chamber 3 by any suitable means, asby a pipe therein to control the admission-of steam. A gage l may also be provided. to indicate the pressure contained in this steamjacket. The blow-off cook 32 is also shown as connected with the upper part ofthersteam jacket and drip cocks 33 connected-with thelower. part of the steanrjaeket, whereby Water. of condensation may be blown out.

In order. to. collectand convey thesteam away to a point tow-here it wouldcause no trouble, I provide a casing 6 atv eachend of the device, which casings each have-anopeningBO in its outer. end wall,.of. such size as to permit free passage of a can without having any more clearance, than may be necessary. Steam discharge pipes 61 connect with each casing and may be led OK to a suitable discharge point. 7

The size of the pipes 1 and 2 which form the can heating or exhausting chamber, may

be made of anything desired, but preferably,

is no larger than is necessary to nicely accommodate the cans passing therethrough. The length of these pipes may also be varied at Will. In practice I have found that a length of twelve feet secures good results This length may, however, be made greater or less, as desired.

The steam pressure in the steam jacketing space 3 is preferably carried well above atmospheric. Its temperature is, therefore, correspondingly high and the cans are thus subjected to a higher temperature than that secured in the ordinary exhaust box, and consequently, they are heated to a higher degree much quicker than they would be in the ordinary exhaust box.

I have found by practical use of this device that the lowering of the pressure of the steam upon discharge into the inner tube without reduction of the heat contents, in sures dry steam acting upon the cans and prevents objectionable condensation and drip therefrom. The high temperature of the tubes due to the high pressure contained in the jacket, assists in securing the above results and causes a more rapid heating of the cans by radiation. In consequence, of this, my device may be small, occupying but little floor space and yet will heat the cans to a temperature which efliciently produces the desired results. In Fig. 1 I have shown the casing, which is at the right hand end of the device, as provided with an opening 62 which may be employed for inspection if desired. I

What I claim as my invention is:

l. A device of the character described comprising a steam jacketed passageway, means for conducting cans therethrough and means for successively subjecting the indi vidual cans to the action of jets of live steam substantially throughout the length of their passage through said passageway.

2. A device for exhausting traveling cans comprising a chamber open to the atmosphere, a steam jacket for said chamber,

means for maintaining steam under pressure in said jacket, means for conducting cans through said chamber and means for introducing live steam into said chamber during the passage of the cans therethrough.

3. A device for exhausting traveling cans comprising an elongated open ended chamber having steam jacketed walls, means for conducting cans through said chamber said cans entering at one end and leaving at the other and means for subjecting said cans to the action of live steam during their passage through said chamber.

4:- A device for exhausting traveling cans comprising an open ended tube, a jacket about said tube, means for supplying steam under pressure to the jacket, and a can conveyer traveler in the tube, said tube having openings, in its walls which establish communication between the interior of the tube and. the jacket, said openings being of such restricted area that pressure may be main tained in the jacket.

5. An exhaust box device for cans comprising two nested tubes connected at their ends to form a steam jacket between them, the inner tube having steam discharging apertures in its walls connecting wit-h said jacketing space and means for passing the cans through said inner tube.

6. A can exhausting device comprising a cans through the tube.

8. A can exhausting device comprising a steam jacketed tube having steam discharging holes in its walls, and a can-conveying belt passing through said tube.

9. A can exhausting device comprising a steam jacketed tube having steam discharging holes in its walls, a steam collecting hood and a discharge pipe therefor connected with each end of the pipe, and a can conveyer passing through the pipe.

10. A can exhausting device comprising two concentric tubes connected at their ends to form a closed annular chamber, the inner tube having steam discharging holes in its walls and its ends open to receive the cans,

means for supplying steam to the said an-' Copi s of this patent may be obtained for five cents each, bv'addressing' the Commissioner of Patents, Washington. D. G, 

